Hello Eli,
I had a long conversation with you in May 2016[1] about understanding the best place/hook for graphics related setup (like fonts) in emacs config, when running emacsclient.
As I later learned in that conversation, neither after-init-hook nor emacs-startup-hook were the right place for that. after-make-frame-functions was also not good unless the frame is selected (which is not the case in emacsclient/daemon). So focus-in-hook turned out to be the best place were I can check if a certain font was available etc.
I have read through (elisp) Startup Summary, but it does not reference after-make-frame-functions and its caveat with emacsclient. It also does not reference focus-in-hook.
I believe having that information in that section will be very valuable to other users using emacsclient in GUI frame.
Copying Rob on this as he had a similar question he asked me off the list.
In GNU Emacs 26.0.90 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.23)
of 2017-10-12
Repository revision: 413978727c9fb1d26b64e81412434064d99ec568
Windowing system distributor 'The X.Org Foundation', version 11.0.60900000
System Description: Red Hat Enterprise Linux Workstation release 6.6 (Santiago)